Collect. Czech. Chem. Commun. 1987, 52, 2266-2273

Synthesis and mass spectra of piperidine and piperazine N-oxyl radicals

Viera Kaliskáa, Štefan Tomaa and Ján Leškob

a Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava
b Laboratory of Mass Spectrometry, Faculty of Chemical Technology, Slovak Institute of Technology, 812 37 Bratislava


It has been found that ultrasound could accelerate the synthesis of piperidine and piperazine N-oxyl radicals. These radicals were investigated for their utilization as spin probes for checking the properties of liquid crystals. Electron impact mass spectra of the N-oxyl radicals were recorded and their fundamental fragmentation pattern was proposed.